n
1 [C] object made by casting (cast1 4a) molten metal, etc 铸件.
2 [U] process of choosing actors for a play, film, etc 挑选演员（演话剧、电影等）
*a strange bit of casting 演员选得有些怪.

n
[U]
the process of choosing the actors for a film or play
→cast
　a casting director
[C]
an object made by pouring liquid metal, plastic etc into a mould (=specially shaped container)
the casting couch
a situation in which an actress is persuaded to have sex in return for a part in a film, play etc - used humorously